22 



FAUNA HAWAIIENSIS 



coloration of the two is different, the Oahuan species having, in typical examples, 

 the prothorax and also the second abdominal segment spotted, whereas in C. mandibu- 

 laris individuals so marked are found only as very unusual varieties. 



(lo) Crabro [So/enius) fulvicrus, sp. nov. 



Niger, clypeo aureo-piloso, tibiis anticis femoribusque (plus minusve) intus fulvo- 

 testaceis ; c/' articulo antennarum sexto baud fortiter dentato, abdominis segmento 4° et 

 5° (vel uno ex his) nonnunquam albo-notatis ; ? mandibulis et antennarum articulo 

 primo plus minusve albo-flavescentibus. </?• Long. 8 — 12 mm. 



Black, (/ with the anterior femora almost entirely, and the anterior tibiae inwardly, 

 bright fulvotestaceous ; ? with the colour of the femora often much obscured. Abdomen 

 black in the ?, in the <? sometimes with a whitish spot on the sides of the 4th and 5th 

 segments, or on the 5th only, and sometimes an entire band on the latter. Scape of 

 the antennae in front and the basal part of the mandibles yellowish in the ? . Clypeus 

 of both sexes with golden pubescence, of a very pale tint in the </'. 



Scape of the antennae in the </ often more or less fulvous, the fifth joint of the 

 flagellum very little produced at the apex, hardly dentate. Head in front very shallowly, 

 rugosely punctured, mesothorax with feebly impressed puncturation. Abdomen with 

 the second segment above rather shining, very finely, but evidently punctured ; beneath, 

 with the surface shining, and finely and remotely punctured about the middle. 



Female with the head above the antennae finely and densely punctured, the meso- 

 thorax posteriorly more or less smooth, and generally (as also part of the scutellum) 

 somewhat shining. On this smoother portion there is a shallow but evident puncturation. 

 Abdomen with the second segment above as in the (/ ; beneath about the middle 

 very smooth and shining with sparse and rather large puncturation. Sixth dorsal 

 segment flat, its margins slightly raised, the surface rough and punctured. 



Wings of c/ infuscate generally with more or less blue iridescence, the wings 

 of the ? clearer. 



Hab. Kona, Hawaii (4000 ft.) ; Olaa (2000 ft.). 



(11) Crabro {Soleiiius) polynesialis. 



Crabro polynesialis, Cameron, Trans. Ent. Soc. 1881, p. 562. Blackburn and 



Cameron, P. Manch. Soc. xxv. (1885—86), p. 168. 

 Praecedenti simillimus, niger, clypeo aureo-piloso, cT antennarum articulo sexto 

 haud fortiter dentato, ? mandibulis, antennarumque articulo basali, plus minusve 



